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312
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247
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197
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87
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86
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50
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2,967
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1,044
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377
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284
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The I=2 pi-pi S-wave Scattering Phase Shift from Lattice QCD
None
Date:
July 25, 2011
Creator:
Beane, S.; Chang, E.; Detmold, W.; Lin, H. W.; Luu, T.; Orginos, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Robert Bearden, March 25, 2013
The National Museum of the Pacific War presents an interview with Robert Bearden. Bearden was in the Texas National Guard when Japan started the war. He was in the 144th Infantry Regiment, 36th Infantry Division and trained at Camp Bowie. His unit went to Fort Lewis in Washington to guard the coast. Bearden then joined the paratroopers and trained at Fort Benning in August, 1942. Bearden speaks a lot about parachute infantry training. He went to England in December, 1943. He jumped into Normandy on 6 June 1944. Around D+5, Bearden was captured by German soldiers. Liberated by Russians in January, 1945, Bearden headed east and eventually reached Moscow, then Odessa, where he was repatriated. He returned to San Antonio and was discharged in July, 1945.
Date:
March 25, 2013
Creator:
Bearden, Robert
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Robert Bearden, March 25, 2013
The National Museum of the Pacific War presents an interview with Robert Bearden. Bearden was in the Texas National Guard when Japan started the war. He was in the 144th Infantry Regiment, 36th Infantry Division and trained at Camp Bowie. His unit went to Fort Lewis in Washington to guard the coast. Bearden then joined the paratroopers and trained at Fort Benning in August, 1942. Bearden speaks a lot about parachute infantry training. He went to England in December, 1943. He jumped into Normandy on 6 June 1944. Around D+5, Bearden was captured by German soldiers. Liberated by Russians in January, 1945, Bearden headed east and eventually reached Moscow, then Odessa, where he was repatriated. He returned to San Antonio and was discharged in July, 1945.
Date:
March 25, 2013
Creator:
Bearden, Robert
Object Type:
Text
System:
The Portal to Texas History
South Texas Catholic (Corpus Christi, Tex.), Vol. 45, Ed. 1 Thursday, March 25, 2010
Semi-monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date:
March 25, 2010
Creator:
Beaton, Paula J.
Object Type:
Newspaper
System:
The Portal to Texas History
Characterization of High Level Waste from a Hybrid LIFE Engine for Enhanced Repository Performance
None
Date:
August 25, 2010
Creator:
Beckett, E. & Fratoni, M.
Object Type:
Report
System:
The UNT Digital Library
Assessment of Proton Deflectometry for Exploding Wire Experiments
This project provides the first demonstration of the application of proton deflectometry for the diagnosis of electromagnetic field topology and current-carrying regions in Z-pinch plasma experiments. Over the course of this project several milestones were achieved. High-energy proton beam generation was demonstrated on the short-pulse high-intensity Leopard laser, (10 Joules in ~350 femtoseconds, and the proton beam generation was shown to be reproducible. Next, protons were used to probe the electromagnetic field structure of short circuit loads in order to benchmark the two numerical codes, the resistive-magnetohydrodynamics (MHD) code, Gorgon, and the hybrid particle-in-cell code, LSP for the interpretation of results. Lastly, the proton deflectometry technique was used to map the magnetic field structure of pulsed-power-driven plasma loads including wires and supersonic jets formed with metallic foils. Good agreement between the modeling and experiments has been obtained. The demonstrated technique holds great promise to significantly improve the understanding of current flow and electromagnetic field topology in pulsed power driven high energy density plasmas. Proton probing with a high intensity laser was for the first time implemented in the presence of the harsh debris and x-ray producing z-pinch environment driven by a mega-ampere-scale pulsed-power machine. The intellectual merit of the program …
Date:
September 25, 2013
Creator:
Beg, Farhat Nadeem
Object Type:
Report
System:
The UNT Digital Library
Energy and Water Development: FY2011 Appropriations
This report discusses key budgetary issues for FY2011 involving the Energy and Water Development appropriations bill, which provides funding for civil works projects of the Army Corps of Engineers, the Department of the Interior's Bureau of Reclamation, the Department of Energy, and a number of independent agencies.
Date:
February 25, 2011
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Energy and Water Development: FY2013 Appropriations
None
Date:
April 25, 2013
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Energy and Water Development: FY2014 Appropriations
This report discusses the Energy and Water Development appropriations bill that provides funding for civil works projects of the Army Corps of Engineers (Corps), for the Department of the Interior's Bureau of Reclamation (Reclamation), the Department of Energy (DOE), and several independent agencies.
Date:
February 25, 2014
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Energy Policy: 113th Congress Issues
Report that discusses the energy policy in the United States, which is focused on three major goals: assuring a secure supply of energy, keeping energy costs low, and protecting the environment.
Date:
July 25, 2013
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Unbound Particles in Dark Matter Halos
None
Date:
April 25, 2013
Creator:
Behroozi, Peter S.; /KIPAC, Menlo Park /Stanford U., Phys. Dept. /SLAC; Loeb, Abraham; U., /Harvard; Wechsler, Risa H. & /KIPAC, Menlo Park /Stanford U., Phys. Dept. /SLAC
Object Type:
Article
System:
The UNT Digital Library
Discover America's Cultural Heritage Collections on the Web
This presentation discusses The Portal to Texas History and the University of North Texas (UNT) Digital Library collections. It also discusses the invisible internet, other Texas digital collections, other large digital collections, major digital collections in other states, subscription databases, and gives strategies for searching all of these databases.
Date:
February 25, 2010
Creator:
Belden, Dreanna
Object Type:
Presentation
System:
The UNT Digital Library
Survey of SRF guns
Developing Superconducting RF (SRF) electron guns is an active field with several laboratories working on different gun designs. While the first guns were based on elliptic cavity geometries, Quarter Wave Resonator (QWR) option is gaining popularity. QWRs are especially well suited for producing beams with high charge per bunch. In this talk we will describe recent progress in developing both types of SRF guns. SRF guns made excellent progress in the last two years. Several guns generated beams and one, at HZDR, injected beam into an accelerator. By accomplishing this, HZDR/ELBE gun demonstrated feasibility of the SRF gun concept with a normal-conducting Cs{sub 2}Te cathode. The cathode demonstrated very good performance with the lifetime of {approx}1 year. However, for high average current/high bunch charge operation CsK{sub 2}Sb is preferred as it needs green lasers, unlike UV laser for the Cs{sub 2}Te, which makes it easier to build laser/optics systems. Other high QE photocathodes are being developed for SRF guns, most notably diamond-amplified photocathode. Several QWR guns are under development with one producing beam already. They are very promising for high bunch charge operation. The field is very active and we should expect more good results soon.
Date:
July 25, 2011
Creator:
Belomestnykh, S.
Object Type:
Article
System:
The UNT Digital Library
Superconducting 112 MHz QWR electron gun
Brookhaven National Laboratory and Niowave, Inc. have designed and fabricated a superconducting 112 MHz quarter-wave resonator (QWR) electron gun. The first cold test of the QWR cryomodule has been completed at Niowave. The paper describes the cryomodule design, presents the cold test results, and outline plans to upgrade the cryomodule. Future experiments include studies of different photocathodes and use for the coherent electron cooling proof-of-principle experiment. Two cathode stalk options, one for multi-alkali photocathodes and the other one for a diamond-amplified photocathode, are discussed. A quarter-wave resonator concept of superconducting RF (SRF) electron gun was proposed at BNL for electron cooling hadron beams in RHIC. QWRs can be made sufficiently compact even at low RF frequencies (long wavelengths). The long wavelength allows to produce long electron bunches, thus minimizing space charge effects and enabling high bunch charge. Also, such guns should be suitable for experiments requiring high average current electron beams. A 112 MHz QWR gun was designed, fabricated, and cold-tested in collaboration between BNL and Niowave. This is the lowest frequency SRF gun ever tested successfully. In this paper we describe the gun design and fabrication, present the cold test results, and outline our plans. This gun will also …
Date:
July 25, 2011
Creator:
Belomestnykh, S.; Ben-Zvi, Ilan; Boulware, C. H.; Chang, X.; Grimm, T. L.; Rao, T. et al.
Object Type:
Article
System:
The UNT Digital Library
Thermometric- and Acoustic-Based Beam Power Monitor for Ultra-Bright X-Rays
A design for an average beam power monitor for ultra-bright X-ray sources is proposed that makes simultaneous use of calorimetry and radiation acoustics. Radiation incident on a solid target will induce heating and ultrasonic vibrations, both of which may be measured to give a fairly precise value of the beam power. The monitor is intended for measuring ultra-bright Free-Electron Laser (FEL) X-ray beams, for which traditional monitoring technologies such as photo-diodes or scintillators are unsuitable. The monitor consists of a Boron Carbide (B{sub 4}C) target designed to absorb most of the incident beam's energy. Resistance temperature detectors (RTD) and piezoelectric actuators are mounted on the outward faces of the target to measure the temperature changes and ultrasonic vibrations induced by the incident beam. The design was tested using an optical pulsed beam (780 nm, 120 and 360 Hz) from a Ti:sapphire oscillator at several energies between 0.8 and 2.6 mJ. The RTDs measured an increase in temperature of about 10 K over a period of several minutes. The piezoelectric sensors recorded ringing acoustic oscillations at 580 {+-} 40 kHz. Most importantly, the amplitude of the acoustic signals was observed to scale linearly with beam power up to 2 mJ of …
Date:
August 25, 2010
Creator:
Bentsen, Gregory & /SLAC, /Rochester U.
Object Type:
Report
System:
The UNT Digital Library
Physical Properties of Hanford Transuranic Waste
The research described herein was undertaken to provide needed physical property descriptions of the Hanford transuranic tank sludges under conditions that might exist during retrieval, treatment, packaging and transportation for disposal. The work addressed the development of a fundamental understanding of the types of systems represented by these sludge suspensions through correlation of the macroscopic rheological properties with particle interactions occurring at the colloidal scale in the various liquid media. The results of the work have advanced existing understanding of the sedimentation and aggregation properties of complex colloidal suspensions. Bench scale models were investigated with respect to their structural, colloidal and rheological properties that should be useful for the development and optimization of techniques to process the wastes at various DOE sites.
Date:
March 25, 2010
Creator:
Berg, John C.
Object Type:
Report
System:
The UNT Digital Library
Vector Boson Jets with BlackHat and Sherpa
We review recent NLO QCD results for W, Z + 3-jet production at hadron colliders, computing using BlackHat and SHERPA, and including also some new results for Z + 3-jet production for the LHC at 7 TeV. We report new progress towards the NLO cross section for W + 4-jet production. In particular, we show that the virtual matrix elements produced by BlackHat are numerically stable. We also show that with an improved integrator and tree-level matrix elements from BlackHat, SHERPA produces well-behaved real-emission contributions. As an illustration, we present the real-emission contributions - including dipole-subtraction terms - to the p{sub T} distribution of the fourth jet, for a single subprocess with the maximum number of gluons.
Date:
August 25, 2010
Creator:
Berger, C.F.; /MIT, LNS; Bern, Z.; /UCLA; Dixon, Lance J.; /SLAC et al.
Object Type:
Article
System:
The UNT Digital Library
The Complete Four-Loop Four-Point Amplitude in N
We present the complete four-loop four-point amplitude in N = 4 super-Yang-Mills theory, for a general gauge group and general D-dimensional covariant kinematics, and including all non-planar contributions. We use the method of maximal cuts - an efficient application of the unitarity method - to construct the result in terms of 50 four-loop integrals. We give graphical rules, valid in D-dimensions, for obtaining various non-planar contributions from previously-determined terms. We examine the ultraviolet behavior of the amplitude near D = 11/2. The non-planar terms are as well-behaved in the ultraviolet as the planar terms. However, in the color decomposition of the three- and four-loop amplitude for an SU(N{sub c}) gauge group, the coefficients of the double-trace terms are better behaved in the ultraviolet than are the single-trace terms. The results from this paper were an important step toward obtaining the corresponding amplitude in N = 8 supergravity, which confirmed the existence of cancellations beyond those needed for ultraviolet finiteness at four loops in four dimensions. Evaluation of the loop integrals near D = 4 would permit tests of recent conjectures and results concerning the infrared behavior of four-dimensional massless gauge theory.
Date:
August 25, 2010
Creator:
Bern, Z.; Carrasco, J.J.M.; /UCLA; Dixon, Lance J.; /CERN, /SLAC; Johansson, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Accelerator Production Options for 99MO
Shortages of {sup 99}Mo, the most commonly used diagnostic medical isotope, have caused great concern and have prompted numerous suggestions for alternate production methods. A wide variety of accelerator-based approaches have been suggested. In this paper we survey and compare the various accelerator-based approaches.
Date:
August 25, 2010
Creator:
Bertsche, Kirk
Object Type:
Article
System:
The UNT Digital Library
Solenoid Compensation for the SuperB Interaction Region
We present an approach for compensating adverse effects of the detector solenoid in the SuperB Interaction Region (IR). We place compensating solenoids around the IR quadrupole magnets to reduce the magnetic fields nearly to zero. This allows more operational headroom for superconducting IR magnets and avoids saturation of ferric IR magnets. We place stronger compensating solenoids between IR magnets to reverse the magnetic field direction. This allows adjusting the total integrated solenoid field to zero, which eliminates coordinate plane rotation and reduces vertical beam displacements in the IR.
Date:
August 25, 2010
Creator:
Bertsche, Kirk & Sullivan, Michael K.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Cecil D. Bettes, September 25, 2012
The National Museum of the Pacific War presents an oral interview with Cecil D. Bettes. Bettes joined the Army after finishing high school in Houston, Texas, in 1943. After basic training, Bettes was shipped to Italy and assigned to E Company, 2nd, Battalion,339th Regiment, 85th Infantry Division. He describes the death in combat of a close friend. In Italy, Bettes was wounded severley and sent to the hospital. Instead of allowing himself to be shipped to France, he broke out of the hospital and returned to his unit. He also mentions breaking through the Gothic Line. Bettes also describes a sour experiences he had with the Red Cross while he was hospitalized. Bettes also describes taking a few German soldiers prisoner.
Date:
September 25, 2012
Creator:
Bettes, Cecil D.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Cecil D. Bettes, September 25, 2012
The National Museum of the Pacific War presents an oral interview with Cecil D. Bettes. Bettes joined the Army after finishing high school in Houston, Texas, in 1943. After basic training, Bettes was shipped to Italy and assigned to E Company, 2nd, Battalion,339th Regiment, 85th Infantry Division. He describes the death in combat of a close friend. In Italy, Bettes was wounded severley and sent to the hospital. Instead of allowing himself to be shipped to France, he broke out of the hospital and returned to his unit. He also mentions breaking through the Gothic Line. Bettes also describes a sour experiences he had with the Red Cross while he was hospitalized. Bettes also describes taking a few German soldiers prisoner.
Date:
September 25, 2012
Creator:
Bettes, Cecil D.
Object Type:
Text
System:
The Portal to Texas History
SuperB Lattice Studies
The SuperB asymmetric e{sup +}e{sup -} collider is designed for 10{sup 36} cm{sup -2} s{sup -1} luminosity and beam energies of 6.7 and 4.18 GeV for e{sup +} and e{sup -} respectively. The High and Low Energy Rings (HER and LER) have one Interaction Point (IP) with 66 mrad crossing angle. The 1258 m rings fit to the INFN-LNF site at Frascati. The ring emittance is minimized for the high luminosity. The Final Focus (FF) chromaticity correction is optimized for maximum transverse acceptance and energy bandwidth. Included Crab Waist sextupoles suppress betatron resonances induced in the collisions with a large Piwinski angle. The LER Spin Rotator sections provide longitudinally polarized electron beam at the IP. The lattice is flexible for tuning the machine parameters and compatible with reusing the PEP-II magnets, RF cavities and other components. Details of the lattice design are presented.
Date:
August 25, 2010
Creator:
Biagini, M. E.; Raimondi, P.; Piminov, P.; Sinyatkin, S.; Nosochkov, Y. & Wittmer, W.
Object Type:
Article
System:
The UNT Digital Library
Subsidy Cost of Federal Credit: Cost to the Government or Fair Value Cost?
Since the mid-1980s, budget experts have debated whether the best method of measuring the subsidy cost of federal credit (direct loans and loan guarantees) is the cost to the government or the fair value cost. This report presents a chronology of this still unresolved debate, which dates from the mid-1980s.
Date:
April 25, 2012
Creator:
Bickley, James M.
Object Type:
Report
System:
The UNT Digital Library